Examples:

<div role="textbox" contenteditable>this is a<br><br>
  test</div>

<div role="textbox" contenteditable><br><br><br>
  this is a</div>

 <div role="textbox" contenteditable>
         <div>this</div><br>
         <div><br>
             I<br>
             can test</div></div>